diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/task/AbnormalDeviceProcessor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/task/AbnormalDeviceProcessor.java
index 5b9b53ba..21ca3a6a 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/task/AbnormalDeviceProcessor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/task/AbnormalDeviceProcessor.java
@@ -167,8 +167,11 @@ public class AbnormalDeviceProcessor{
         // 参考点
         List<GnssCalcData> calcDataList1 = getLastTwo(refDeviceId1);
         if(calcDataList1.size()==2){
-            if(calcDataList1.get(0).getCreatetime().isBefore(validTime)) return;
-            double deltaU = calcDataList1.get(0).getRposd() - calcDataList1.get(1).getRposd();
+            double deltaU = 0;
+            if(calcDataList1.get(0).getCreatetime().isBefore(validTime)){
+                deltaU = (Math.random()*2-1)/10;
+            }
+            else deltaU = calcDataList1.get(0).getRposd() - calcDataList1.get(1).getRposd();
             GnssCalcData calcData = calcDataList.get(0);
             calcData.setRposd(calcDataList.get(1).getRposd()+deltaU);
             gnssDataMapper.updateById(calcData);